I cannot smell or taste for 2 months flonase allegra (fexofenadine) does not work.?

See ENT: Could be a variety of problems including chronic sinusitis, nasal polyps, and so on. See an ENT doctor for exam and workup.

Taste is smell : Nasal inflammation can cause anosmia (loss of sense of smell). Since most of taste is related to smell they often are both affected. Although medications can usual decrease nasal symptoms anosmia may persist. Oral or injectable steroids often temporarily restore taste and smell, but side effect Prohibit their use.